The influence of acetyl phosphate on DspA signalling in the Cyanobacterium Synechocystis sp. PCC6803.

Abstract:

BACKGROUND:The dspA (hik33) gene, coding for a putative sensory histidine kinase, is conserved in plastids (ycf26) and cyanobacteria. It has been linked with a number of different stress responses in cyanobacteria. RESULTS:We constructed an insertional mutant of dspA (ycf26) in Synechocystis 6803. We found little phenotypic effect during nitrogen starvation. However, when the mutation was combined with deletion of the pta gene coding for phosphotransacetylase, a more significant phenotype was observed. Under nitrogen starvation, the pta/dspA double mutant degrades its phycobilisomes less than the wild type and still has about half of its chlorophyll-protein complexes. CONCLUSION:Our data indicates that acetyl-phosphate-dependent phosphorylation of response regulator(s) overlaps with DspA-dependent signalling of the degradation of chlorophyll-protein complexes (and to a lesser extent phycobilisomes) in Synechocystis 6803.

journal_name

BMC Microbiol

journal_title

BMC microbiology

authors

Morrison SS,Mullineaux CW,Ashby MK

doi

10.1186/1471-2180-5-47

keywords:

subject

Has Abstract

pub_date

2005-08-02 00:00:00

pages

47

issn

1471-2180

pii

1471-2180-5-47

journal_volume

5

pub_type

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